CAJ | 학술논문

对编码分集在MIMO系统中应用做详细的介绍,编码分集选取了正交空时分组码的编码结构和基于线性接收的最大似然译码准则。主要探讨了包括Alamouti空时码,3发射天线和4发射天线在内的正交空时分组码。还介绍了一种基于并行Alamouti编码的新的分集传输方案,该方案的编码性能和Alamouti码相似,它的优势在于大大简化了MIMO系统的改造复杂度。最后,通过仿真这几种空时编码并详细分析了在不同调制模式下的误比特性能。
대편마분집재MIMO계통중응용주상세적개소,편마분집선취료정교공시분조마적편마결구화기우선성접수적최대사연역마준칙。주요탐토료포괄Alamouti공시마,3발사천선화4발사천선재내적정교공시분조마。환개소료일충기우병행Alamouti편마적신적분집전수방안,해방안적편마성능화Alamouti마상사,타적우세재우대대간화료MIMO계통적개조복잡도。최후,통과방진저궤충공시편마병상세분석료재불동조제모식하적오비특성능。
This paper is detailed in the study for diversity coding in MIMO systems.Here,the orthogonal structure of the space-time block code and a maximum-likelihood decoding algorithm which is based only on linear processing at the receiver are introduced.Different space-time block coding（STBC） schemes including Alamouti STBC as well as orthogonal STBC for 3 and 4 transmit antennas are explored.We present a new transmit strategy based on parallel Alamouti codes for the simple two branch transmit diversity scheme.The proposed encoding scheme can significantly simplify the processes of transforming SISO into MIMO in wireless communication systems,its coding gain is similar to Alamouti code.Finally,comparisons with these STBC implementations are also provided and analyzed for performance according to their bit-error rates using diversified modulation schemes.